registerGlobalTextMapPropagator function
Implementation
void registerGlobalTextMapPropagator(api.TextMapPropagator textMapPropagator) {
if (_textMapPropagator != null) {
throw StateError('A global TextMapPropagator has already been created. '
'registerGlobalTextMapPropagator must be called only once before any '
'calls to the getter globalTextMapPropagator.');
}
_textMapPropagator = textMapPropagator;
}